Bronchitis is mostly characterized by coughing and sputum, and the specific symptoms of different types of bronchitis vary. Acute trachea-bronchitis is generally harmless, while chronic bronchitis may lead to complications such as chronic obstructive pulmonary disease (COPD), pulmonary arterial hypertension (PAH), and pulmonary heart disease (PHD). Acute trachea – the main symptom of bronchitis is coughing, at first dry cough, and later is coughing up sputum, coughing pain behind the sternum, delayed may develop into sexual bronchitis. Chronic bronchitis is mostly a morning cough, sputum is white mucus or plasma foamy, occasionally with blood. If chronic bronchitis is not treated in time, it may cause chronic obstructive pulmonary disease, pulmonary hypertension, pulmonary heart disease and other complications, and in severe cases, respiratory failure and other life-threatening. In order to prevent these hazards from occurring and to restore health as soon as possible, patients need to actively cooperate with doctors for treatment.